[gdk-pixbuf] docs: Add missing symbol index for 2.38

[Emmanuele Bassi <ebassi src gnome org>]

commit 061dca7c1c3e14638a3a6385c17794f32123871c
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Sat Sep 1 11:25:28 2018 +0100

    docs: Add missing symbol index for 2.38

 docs/gdk-pixbuf.xml | 4 ++++
 1 file changed, 4 insertions(+)
---
diff --git a/docs/gdk-pixbuf.xml b/docs/gdk-pixbuf.xml
index 2c10c1768..84454f5c2 100644
--- a/docs/gdk-pixbuf.xml
+++ b/docs/gdk-pixbuf.xml
@@ -186,6 +186,10 @@
     <title>Index of new symbols in 2.36.8</title>
     <xi:include href="xml/api-index-2.36.8.xml"><xi:fallback /></xi:include>
   </index>
+  <index id="api-index-2-38" role="2.38">
+    <title>Index of new symbols in 2.38</title>
+    <xi:include href="xml/api-index-2.38.xml"><xi:fallback /></xi:include>
+  </index>
 
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